Excelsior-cutting machine



G. W. BERRY.

EXCELSIOR CUTTING MACHINE.

APPLICATION FILED OCT. 29, m9.

Patented May 25, 1920.

2 SHEETS-SHEET l- G. W. BERRY. ,EXCELSIOR CUTTING MACHINE. APPLICATION FILED 01:1. 29, 1919.

1,341,037, Patented May 25, 1920.

2 SHEETS-SHEET 2- UNITED STATES GEORGE W. BERRY, OF WOLFEBORO, NEW HAMPSHIRE.

EXCELSIOR-CUTTIING MACHINE.

specification of Letters Patent.

Patented May 25,1920.

Application filed October 29, 1919. Serial No. 334,188.

To allwhom it may concern Be it known that I, GEORGE W. BERRY, a

citizen of the United States, residing at W olfeboro, in the county of Carroll and State of New Hampshire have. invented new and useful Improvements in Excelsior- Cuttin Machines, of which the following is a speci cation.

This invention relates chiefly to the means employed in an excelsior cutting machine for guiding the reciprocating face plate which carries the usual scoring and shaving knives.

The invention has for its object to provide face-plate guiding means of simple and durable construction, adapted to compensate for all wear of rubbing parts, to insure movement of the face-plate without loose motion'and deviation from a predetermined path, and to permit convenient renewal of worn out parts.

The invention is embodied in the improvements which I will now proceed to describe and claim. 5

Of the accompanying drawings forming a part of this specification,-

Figure 1 is a front elevation of the machine, the face-plate being lowered.

Fig. 2 is a section on line 22 of Fig. 1, omitting the face-plate.

Fig. 3 is a side view of the face-plate.

Fig. 4 is an edge view of the face-plate.

Fig. 5 is a section partly on line 55, and partly on line 5*5 of Fig. 2, certain parts shown by Fig. 2 being omitted.

Fig. dis a section on line 6-6 of Fig. 1.

Figs. 7 and 8 are side views'of the guidemember-carrying bars separated from each otlier.

Fig.

Fig. 8.

Fi Fig.

Fig. Fig. 7

Fig. 13 is a'sectional view of one of the runners.

Fig. 14 is a perspective-view of the pitman and face-plate connecting member.

Fig. 15 is a plan view, and

Fig. 16 an end view of the worm on the driving-shaft.

The frame of the machine includes a base 9 is a section on line 9-9 of Fig. 8. 10 is a section on line 10--1O of 11 is a section on line 1111 of 12 is 'a-section on line 1212 of portion 20, and spaced apart uprights 21 and 22, these being preferably stout wooden beams.

The reciprocating face-plate 23 (Figs. 3 and which carries the usual scoring or groovlngkmves 24, and shaving knife 25, of an excelsior cutting machine, is provided at its opposite edges with ofiset ears-26 to which are rigidly and detachably secured tool steel runners 27 and 27 each formed in cross section as shown byFig. 13. Each runner is longitudinally grooved to receive an edge portion of the face plate, and has oppositely facing inner and outer sides, and an intermediate side at right angles to the inner and outer sides and extending across the edge of the face plate. Said runners slide in vertical guiding structures, which are capable of various adjustments. gulding structure at the left-hand edge of the face-plate, as viewed in Fig. 1, is hereinafter called the outer guiding structure, for convenience in distinguishing it from the guiding structure at the opposite edge of the face-plate, said outer guiding structure being next described.

To the upright 21 is attached by bolts 28, a fixed elongated outer metal bar, 29, shown in elevation by Fig. 7, and in section by Figs/11, 12, said bar being provided at intervals with recessed bosses 30, bearing on the upright 21, and receiving the heads of the bolts 28, as best shown by Fig. 5. The fixed bar 29 contacts with the intermediate side of the runner 27, and is provided at one edge with a flange 31, to which is attached an elongated bronze strip or guide member 32, with which the outer side of the runner 27 is in sliding contact, the member 32 being fixed and non-adjustable. To the fixed outer bar 29 is adjustably secured a similarly elongated movable or adjustable'inner bar 3 1, shown in elevation by Fig. 8, and in section by Figs. 9 and 10. To one edge of the movable-inner bar 34 is fixed an elongated bronze stripor guide member 35, with .whichfthe inner side of the runner 27.is

in sliding contact. The movable inner bar 34 is provided with transverse slots 36, through which pass headed clamping 'bolts 37, en gaged with tapped'orifices 38 in the fixed outer bar 29. Said slots and bolts permit the adjustment of the movable bar 34 and its guide member 35 to vary the distance be- The tween the guide members 32 and 35, and compensate for wear of the guide members and of the interposed runner 27.

The outer bar 29 is provided with spaced apart ears 40, tapped to engage .setscrews 41 which bear on the inner bar 34, and co operate with the bolts 37 in securing the bar 34 in any adjusted position. 7

The inner guiding structure is supported by the upright 22, and includes guiding members 32 and 35, bearing on opposite sides of the. runner 27 and elongated bars 29 and 34 supporting said guide members. The bar 29 contacts with the intermediate side of the runner 27 The bars 29 and 34" are counterparts, or reversed duplicates of the bars 29 and 34, and are adjustable toward and from the upright 22, to vary the distance between the runners 27 and 27 and thus provide additional wear-compensating means. I To this end I make the bolts. 28 in the upright 22 somewhat longer than the corresponding bolts 28, in the upright 21 as shownby Fig. 5,-and provide the upright 22 with metal plates 42 (Fig. 6) which are tapped to engage bearing screws 43 extending through the upright 22, and bearing at their inner endson the bar 29. f By loosening the nuts on the bolts 28*, and adjusting the bearing screws 43-inwardly, I am enabled to increase the distance between "the upright 22 and the bars 29 and 34. g

The described means for guiding the "face plate 23 including theinner and'outer guid-- ing structures,"provide compensation for-all wear of rubbing surfaces, and enable the" face plate 23-to be kept in a predetermined path of movement without ,edgewise displacement, such as would'cause the paths'of the scoring knives'24 during any stroke, to

deviate from the paths during .a preceding stroke. At each stroke the scoring knives should be in position to deepen the scores or grooves formed in the block at a preceding stroke, so that shavings of uniform width will be detached by the knife 25.

The machine is provided with the usual feed rolls 45 and 46, which respectively engage the lower and upper ends of the wood block 47 to be cut into excelsior, and are intermittently rotated to feed the block toward the face plate 23. The shaft of the lower feed roll 4-5 is j ournaled in bearings 48 fixed to the uprights 21 and 22, and the shaft of the upper feed roll 46 is journaled in bearings 49 which are fixed to slides'50 movable vertically on said uprights. Said slides are pulled downward by springs 51 to hold the upper feed rollin engagement with the up- 'per end ofthe block, and are adapted to be raised to separate said feed roll from the block, by a rock shaft 53 journaled in fixed bearings 54,;and provided with pi-nions 55 'meshingwithracks56 fixed tothe slides 50,

and with a hand lever 57. The driving shaft 58 is journaled in a bearing 59 on the upright 21, and reciprocates the face plate 23 through a disk 60 having a wrist-pin 61,

the inner side of the member being grooved at to engage one side of the pitman, the latter being ofwood. An elongated orifice 66 in the member 63 receives two bearing blocks 67 which are grooved to provide an orifice 68 for the pin which connects the pitman with the face plate. The upper block 67 is held by a wedge-shaped key 68 driven into a'slot 69. V

The shaft of the lower-feed'rollr-45 has a worm gear'70, engaging a worm 71, fixed to a vertical shaft section 72. The shaft of the upper feed roll has a worm gear'73 engaging a worm 74, which is adapted to slide on and rotate withthe shaft section 72. A clutch 75 connects the shaft section 72 with an'upper shaft section'76. A worm gear 77 on the upper shaft section engages a worm of original construction fixed to the drivingshaft 58. "Said worm includes ahelical rib 7 9 and a sleeve 80'on which said rib is formed. The sleevegis provided with slots 81, extendingfrom'its bore nearly to the outer edge of the rib '79, as shown by.

Fig. 16, the slots-rendering the sleeve compressible, so that'it maybe clamped firmly by screws 8201 theshaft 58, there being no interruption of; the continuity of the rib. The form of the rib 79 is such that each complete rotation of the shaft 58 imparts a parital rotation to the'shaft sections 76 and 72,; and then allows said sections to stop, so. that the feed rolls are intermittently rotated to feed the block forward after each cutting movement of the face plate.

I am enabled, by providing the face plate 23'with the tool steel runners 27, detachably secured to the face plate by screws 27, to not only renew said runners when they are worn out, but also to make the face plate of a different material, such as aluminum. In practice, I make the entire face plate from a number 12 aluminum mixture, and thereby greatly reduce the weight of the face plate and the power required to reciprocate it, as compared with a face plate made, as heretofore, of iron or steel, the reduction be ing nearly one hundred per cent. 1

The bar 29 positively and non-adjustably securedto the upright 21, constitutes a fixed abutment against which the runnerv 27 is held by the'adjustable bar'29 so that the face plate is guided in a predetermined path and cannot I deviate 3 from; said pathr'" Provision is therefore made for preventing any deviation of the cutting knives during their return movement, from the paths in which they move while cutting. This provision insures the formation of shavings of uniform width, and prevents cutting the formation of very narrow or hair-like shavings, which are practically useless.

I claim:

1. An excelsior cutting machine comprising a pair of spaced apart uprights, a knifecarrying face plate movable in a vertical path between said uprights, and provided at its opposite edges with vertical runners, each presenting parallel outer and inner faces, and an intermediate face at right angles with the outer and inner faces, and a pair of guiding structures including elongated outer bars contacting with the intermediate runner faces, and provided with flanges contacting with the outer runner faces, and elongated innerbars adjustably secured to the outer bars and contacting with the inner runner faces, means positively securing the outer bar of one of the guiding structures to one of said uprights, so that said bar is non-adjustable, and means adj ustably securing the outer bar of the other guiding structure to the other upright, to permit a wear-compensating variation of the space between the two guiding structures, the said non-adjustable bar constituting a fixed abutment against which one runner of the face plate is held by the corresponding bar of the adjustable guiding structure, whereby deviation of the face plate from a predetermined path is prevented.

2. In an excelsior cutting machine, a knifecarrying face plate having vertical flanges at its edges, and provided with vertical runners, substantially U-shaped in cross section, detachably secured to and covering said flanges.

In testimony whereof I have affixed my signature.

GEORGE W. BERRY. 

